Which navigational error increases following inaccurate sextant index arm calibration?

💡 Explanation

An incorrectly calibrated index arm on a sextant introduces systematic error when measuring angles to celestial bodies due to angular misrepresentation. Index error introduces a consistent shift of measured angle; therefore the observed altitude is consistently off, rather than affecting dead reckoning through compass errors.

• Which consequence results when the Andean terraced field-systems experience extreme rainfall?
• Which outcome occurred when terrace slopes were undermined?
• Which risk increased for early bronze-smiths when copper sulfide ores required higher smelting temperatures?
• Which problem emerged using early algebraic methods in canal irrigation systems?
• Which navigational outcome arises from limitations in 18th-century shipwright's understanding of material fatigue in timbers?
• Which water management outcome occurs during high rainfall on terraced hillsides employing Inca agricultural systems?